opensim-development – Rev 1
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* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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*/
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
namespace OpenSim.Region.CoreModules.World.Terrain.PaintBrushes
{
/// <summary>
/// Thermal Weathering Paint Brush
/// </summary>
public class WeatherSphere : ITerrainPaintableEffect
{
private const double talus = 0.2;
private const NeighbourSystem type = NeighbourSystem.Moore;
#region Supporting Functions
private static int[] Neighbours(NeighbourSystem neighbourType, int index)
{
int[] coord = new int[2];
index++;
switch (neighbourType)
{
case NeighbourSystem.Moore:
switch (index)
{
case 1:
coord[0] = -1;
coord[1] = -1;
break;
case 2:
coord[0] = -0;
coord[1] = -1;
break;
case 3:
coord[0] = +1;
coord[1] = -1;
break;
case 4:
coord[0] = -1;
coord[1] = -0;
break;
case 5:
coord[0] = -0;
coord[1] = -0;
break;
case 6:
coord[0] = +1;
coord[1] = -0;
break;
case 7:
coord[0] = -1;
coord[1] = +1;
break;
case 8:
coord[0] = -0;
coord[1] = +1;
break;
case 9:
coord[0] = +1;
coord[1] = +1;
break;
default:
break;
}
break;
case NeighbourSystem.VonNeumann:
switch (index)
{
case 1:
coord[0] = 0;
coord[1] = -1;
break;
case 2:
coord[0] = -1;
coord[1] = 0;
break;
case 3:
coord[0] = +1;
coord[1] = 0;
break;
case 4:
coord[0] = 0;
coord[1] = +1;
break;
case 5:
coord[0] = -0;
coord[1] = -0;
break;
default:
break;
}
break;
}
return coord;
}
private enum NeighbourSystem
{
Moore,
VonNeumann
} ;
#endregion
#region ITerrainPaintableEffect Members
public void PaintEffect(ITerrainChannel map, bool[,] mask, double rx, double ry, double rz, double strength, double duration)
{
strength = TerrainUtil.MetersToSphericalStrength(strength);
int x;
for (x = 0; x < map.Width; x++)
{
int y;
for (y = 0; y < map.Height; y++)
{
if (!mask[x,y])
continue;
double z = TerrainUtil.SphericalFactor(x, y, rx, ry, strength);
if (z > 0) // add in non-zero amount
{
const int NEIGHBOUR_ME = 4;
const int NEIGHBOUR_MAX = 9;
for (int j = 0; j < NEIGHBOUR_MAX; j++)
{
if (j != NEIGHBOUR_ME)
{
int[] coords = Neighbours(type, j);
coords[0] += x;
coords[1] += y;
if (coords[0] > map.Width - 1)
continue;
if (coords[1] > map.Height - 1)
continue;
if (coords[0] < 0)
continue;
if (coords[1] < 0)
continue;
double heightF = map[x, y];
double target = map[coords[0], coords[1]];
if (target > heightF + talus)
{
double calc = duration * ((target - heightF) - talus) * z;
heightF += calc;
target -= calc;
}
map[x, y] = heightF;
map[coords[0], coords[1]] = target;
}
}
}
}
}
}
#endregion
}
}